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A Practical Guide to Ubuntu Linux, Third Edition by Mark G. Sobell

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25. firestarter, gufw, and iptables: Setting Up a Firewall

The gufw and firestarter utilities are user-friendly, graphical front-ends for iptables; iptables builds and manipulates network packet filtering (page 1164) rules in the Linux kernel. You can use firestarter, or iptables directly, to create a firewall that protects a system from malicious users and to set ...

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